EP0178644B1 - Method and apparatus for the production of weaving warps of monofilament thermoplastic synthetic yarn - Google Patents
Method and apparatus for the production of weaving warps of monofilament thermoplastic synthetic yarn Download PDFInfo
- Publication number
- EP0178644B1 EP0178644B1 EP85113114A EP85113114A EP0178644B1 EP 0178644 B1 EP0178644 B1 EP 0178644B1 EP 85113114 A EP85113114 A EP 85113114A EP 85113114 A EP85113114 A EP 85113114A EP 0178644 B1 EP0178644 B1 EP 0178644B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- warp
- rolls
- yarn
- yarns
- accumulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D7/00—Collecting the newly-spun products
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02H—WARPING, BEAMING OR LEASING
- D02H5/00—Beaming machines
- D02H5/02—Beaming machines combined with apparatus for sizing or other treatment of warps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
- B65H2701/313—Synthetic polymer threads
- B65H2701/3132—Synthetic polymer threads extruded from spinnerets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/38—Thread sheet, e.g. sheet of parallel yarns or wires
Definitions
- warp section i.e. a warp containing a fractional number of yarns relative to the total number of yarns which will be placed on the weaving loom, it being possible to obtain a weaving warp suitable for direct use on the loom by unwinding a plurality of warp sections and rewinding them onto a single beam by a process known as assembly winding.
- warp section i.e. a warp containing a fractional number of yarns relative to the total number of yarns which will be placed on the weaving loom
- the spinning device contains one or more single nozzle spinneret(s). After cooling and oiling, the monofilaments corresponding to the nozzles are wound up individually on the take-up device, each monofilament being wound up on its own spool or package.
- the spinning head can house only a limited number of spinnerets and the subsequent filament cooling device and take-up device(s) can serve only one single spinning head with the said limited number of yarns.
- spinnerets provided with a plurality of nozzles are used, and all the yarns emerging from such a spinneret are cooled, oiled and parallel-wound on a single spool.
- This spool containing a plurality of individual yarns, is then unwound by the rolling take-off method and the individual yarns are rewound, each yarn being wound onto its own single spool.
- the weaving warp is then obtained by the warping of a large number of yarns coming from as many spools (or "packages") placed on a creel.
- the object of the present invention is to improve a system for the production of weaving warps wherein the spinning device is able to produce simultaneously the exact number of yarns required to form the weaving warp.
- the method of the present invention is proper for the production of weaving warps from monofilament thermoplastic yarns of the following types: polyester, polyamides, polypropylene.
- the device for accomplishing the process shown schematically in the figures comprises the following features known e.g. from US-A-2 964 827:
- the equipment also incorporates:
- the melt spinning head may have a single spinneret having a number of nozzles equal to the number of yarns constituting the weaving warp, or it may be provided with a plurality of spinnerets, with the total nozzle number equal to the number of yarns constituting the said warp.
- the number of yarns required for a weaving warp is normally at least 500.
- the equipment is substantially reduced compared to the traditional systems, in that it is not necessary to pass through the single spool ("package") stage, the yarns obtained from spinning being used directly to form the weaving warp.
- the warp manufacturing process is therefor absolutely continuous. It is not divided into two separate stages, as in the traditional systems, where there is a separate spinning stage with the yarn being taken up on spools, followed by a second warping stage, starting from such spools previously loaded onto a feed creel.
- the production of weaving warps with a single spinning head and a single collection device is therefore made possible, in contrast to the traditional systems, where it is necessary to have a large number of spinning heads for each weaving warp, and the warping operation is moreover carried out in a subsequent stage completely separated from the melt spinning stage.
- an essential element in the process, and in the related equipment is constituted by the device for the accumulation and recovery of the yarn sheet arising from the continuous spinning stage; it allows the replacement of the warping beam without the need to stop the spinning process, it being only necessary to reduce the spinning speed.
- the above device may be constituted in particular by two sets of rolls both positioned horizontally and with their axes perpendicular to the direction of travel of the yarn sheet, the rolls of the first set (19), located at the lower level, being in a fixed position, whilst those of the second set (20) are in a staggered position relative to the rolls of the first set, and can moreover be shifted vertically downwards.
- the upper set of rolls is lowered beneath the stationary set, until the position (2) is reached, thus completing the yarn sheet to run along a looped path.
- the amount of yarn which can be accummu- lated in such a way will be proportional to the number of rolls and to the maximum possible distance between the stationary rolls and the movable rolls.
- the accumulation device starts operating simultaneously with the yarn sheet nipping, cutting and taping devices during a beam change. It is obvious that, in the process according to the present invention, every known device for the accumulation and changing of the warp beam may be used.
- the spinning process may be advantageously integrated with a yarn sheet drawing device using two sets of rolls, preferably constituted by a main roll of greater diameter and two pressure rolls per each set, the peripheral velocity of the second set being greater than that of the first system, so that the ratio of the two relative peripheral velocities is equal to the desired yarn draw ratio.
- thermoplastic resin used, a high wind-up speed allows nearly completely drawn yarns to be obtained, such yarns being suitable for direct use in weaving.
- a typical characteristic of the novel process for the preparation of warps is that it permits extremely high yarn wind-up speeds, speeds in excess of 6000 m/min, without any mechanical problems being evident, as the collecting beam is anchored on both sides in the winding machine.
- various known systems may be used, essentially constituted by rubber clamping jaws, by devices for feeding and applying an upper and a lower layer of adhesive tape, and by a yarn sheet cutting device.
- a weaving warp constituted by 580 monofilament yarns of round cross section was prepared, collected on a small hosiery beam having a distance of 22 inches between the flanges.
- the spinning was carried out at a polymer temperature of 297°C through a spinneret of rectangular shape, of dimensions 620 mmx55 mm, having four mutually staggered rows of 154 round nozzles.
- the oiling device was calibrated so as to obtain 0.4% of oil on the yarn.
- the final count of the yarn was 20 denier, and the residual elongation was 34%.
- Example 1 Starting from the thermoplastic resin in Example 1, and using the same spinneret, the spinning was carried out at 299°C, the spin finish application device having been calibrated so as to obtain 0.55% of finish on the yarn.
- the final yarn count was 20 denier, and the residual elongation was 63%.
- the substrate of monofilament yarn After subsequent dyeing with a dye sensitive enough to reveal possible irregularities, the substrate of monofilament yarn showed uniform dye absorption.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Warping, Beaming, Or Leasing (AREA)
- Artificial Filaments (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
- In the following disclosure, the term "weaving warp" is used synonymous with "warp section" i.e. a warp containing a fractional number of yarns relative to the total number of yarns which will be placed on the weaving loom, it being possible to obtain a weaving warp suitable for direct use on the loom by unwinding a plurality of warp sections and rewinding them onto a single beam by a process known as assembly winding. Although the disclosure refers specifically to warps for weaving end-use, there is not restriction intended on the use of such warps to any particular textile application.
- In traditional systems for the preparation of weaving warps of mono-filament thermoplastic synthetic yarn, the spinning device contains one or more single nozzle spinneret(s). After cooling and oiling, the monofilaments corresponding to the nozzles are wound up individually on the take-up device, each monofilament being wound up on its own spool or package.
- The spinning head can house only a limited number of spinnerets and the subsequent filament cooling device and take-up device(s) can serve only one single spinning head with the said limited number of yarns. In other cases, spinnerets provided with a plurality of nozzles are used, and all the yarns emerging from such a spinneret are cooled, oiled and parallel-wound on a single spool. This spool, containing a plurality of individual yarns, is then unwound by the rolling take-off method and the individual yarns are rewound, each yarn being wound onto its own single spool. The weaving warp is then obtained by the warping of a large number of yarns coming from as many spools (or "packages") placed on a creel.
- Ifthe yarn obtained in the melt spinning stage is not sufficiently drawn, it is necessary to submit it to a drawing process, carried out on suitable machines, before warping. Normally such drawing machines act individually on each undrawn spool to produce a corresponding drawn spool ("single end processing").
- The object of the present invention is to improve a system for the production of weaving warps wherein the spinning device is able to produce simultaneously the exact number of yarns required to form the weaving warp.
- The method of the present invention is proper for the production of weaving warps from monofilament thermoplastic yarns of the following types: polyester, polyamides, polypropylene.
- The device for accomplishing the process shown schematically in the figures, comprises the following features known e.g. from US-A-2 964 827:
- -Extruder and melt spinning head (1), comprising one or more pump(s) (2) for metering the molten polymer, spin back and spinneret retaining block (3) and a spinneret with as many nozzles as the number of yarns required;
- -Extruded filament cooling device, constituted by an air blowing chamber (4);
- -Spinning duct (5);
- -Spin finish application or oiling device (6) and yarn guides (7);
- -Yarn suction device (8), activated in the event of yarn breakage, and a yarn separating guide (9);
- -Yarn transport rolls ("godets") (10), (11), which may also be used to stretch or draw the yarn sheet, and optional drawing devices and apparatus;
- -Yarn sheet nipping (13), cutting (14) and taping (15) devices, used in order to replace the fully wound warping beam during continuous spinning operation;
- -Yarn separating guide ("reed") (16);
- -Warping beam winding assembly (17).
- According to the present invention, the equipment also incorporates:
- -Yarn accumulation and recovery device (12), allowing the yarn sheet to be stored during a beam change without interrupting the spinning process, it being only necessary to reduce the speed of spinning during such a beam change.
- The more typical parts and functions of the equipment are now considered in greater detail.
- The melt spinning head may have a single spinneret having a number of nozzles equal to the number of yarns constituting the weaving warp, or it may be provided with a plurality of spinnerets, with the total nozzle number equal to the number of yarns constituting the said warp.
- By using a plurality of spinnerets, a greater temperature uniformity can be obtained, as the surface in contact with the heat transfer medium within the spinning head is increased.
- The number of yarns required for a weaving warp is normally at least 500.
- By means of the weaving warp production system according to the present invention, the equipment is substantially reduced compared to the traditional systems, in that it is not necessary to pass through the single spool ("package") stage, the yarns obtained from spinning being used directly to form the weaving warp.
- The warp manufacturing process is therefor absolutely continuous. It is not divided into two separate stages, as in the traditional systems, where there is a separate spinning stage with the yarn being taken up on spools, followed by a second warping stage, starting from such spools previously loaded onto a feed creel.
- By means of the process according to the present invention, the production of weaving warps with a single spinning head and a single collection device is therefore made possible, in contrast to the traditional systems, where it is necessary to have a large number of spinning heads for each weaving warp, and the warping operation is moreover carried out in a subsequent stage completely separated from the melt spinning stage.
- According to the preferred embodiment of the present invention, an essential element in the process, and in the related equipment, is constituted by the device for the accumulation and recovery of the yarn sheet arising from the continuous spinning stage; it allows the replacement of the warping beam without the need to stop the spinning process, it being only necessary to reduce the spinning speed.
- The above device may be constituted in particular by two sets of rolls both positioned horizontally and with their axes perpendicular to the direction of travel of the yarn sheet, the rolls of the first set (19), located at the lower level, being in a fixed position, whilst those of the second set (20) are in a staggered position relative to the rolls of the first set, and can moreover be shifted vertically downwards.
- Under normal operating conditions, the yarn sheet runs between the two sets of rolls, without coming into contact with the said rolls.
- In the accumulation stage, however, the upper set of rolls is lowered beneath the stationary set, until the position (2) is reached, thus completing the yarn sheet to run along a looped path.
- The amount of yarn which can be accummu- lated in such a way will be proportional to the number of rolls and to the maximum possible distance between the stationary rolls and the movable rolls.
- The accumulation device starts operating simultaneously with the yarn sheet nipping, cutting and taping devices during a beam change. It is obvious that, in the process according to the present invention, every known device for the accumulation and changing of the warp beam may be used.
- The spinning process may be advantageously integrated with a yarn sheet drawing device using two sets of rolls, preferably constituted by a main roll of greater diameter and two pressure rolls per each set, the peripheral velocity of the second set being greater than that of the first system, so that the ratio of the two relative peripheral velocities is equal to the desired yarn draw ratio.
- Immediately after the drawing and before the accumulator, according to the final desired characteristics of the warps, it could be convenient to include a conventional device for thermal relaxation and heat setting of the warp.
- By means of the industrial process which is object of the present invention, it is thus possible to obtain weaving warps composed of yarns having different characteristics, essentially depending on whether the drawing device just described is used or not, and/or on the final wind-up speed.
- It is obvious that, by using the drawing device, completely drawn yarns can be produced. In the absence of the drawing device, the final wind-up speed determines the molecular orientation (and characteristics) of the so-produced yarn, with increasing wind-up speed resulting in increased molecular orientation.
- According to the characteristics of the thermoplastic resin used, a high wind-up speed allows nearly completely drawn yarns to be obtained, such yarns being suitable for direct use in weaving.
- At an intermediate wind-up speed, incompletely drawn yarns are obtained, and the warps so obtained can be advantageously drawn by using the wet warp-drawing process, as disclosed in the earlier Italian Patent Applications No. 19907/82, 23476/83 and 24050/83, of the present Applicant.
- A typical characteristic of the novel process for the preparation of warps is that it permits extremely high yarn wind-up speeds, speeds in excess of 6000 m/min, without any mechanical problems being evident, as the collecting beam is anchored on both sides in the winding machine.
- This results in less wear and greater reliability than is found in traditional spool winding systems.
- For the nipping, cutting and taping of the warp sheet at a beam change, various known systems may be used, essentially constituted by rubber clamping jaws, by devices for feeding and applying an upper and a lower layer of adhesive tape, and by a yarn sheet cutting device.
- Starting from a semi-dull polyester resin obtained by poly-condensation of terephthalic acid and ethylene glycol, having the following main characteristics:
- The spinning was carried out at a polymer temperature of 297°C through a spinneret of rectangular shape, of dimensions 620 mmx55 mm, having four mutually staggered rows of 154 round nozzles.
- The oiling device was calibrated so as to obtain 0.4% of oil on the yarn.
- No drawing devices were used, and a final collection speed of 1560 m/min. was maintained.
- A warp, consisting of yarns having a count of 71 denier, was obtained.
- The warp was then submitted to a wet drawing and hot fixation treatment according to the Applicants' process disclosed in the hereinabove mentioned Patent Applications.
- The final count of the yarn was 20 denier, and the residual elongation was 34%.
- Starting from the thermoplastic resin in Example 1, and using the same spinneret, the spinning was carried out at 299°C, the spin finish application device having been calibrated so as to obtain 0.55% of finish on the yarn.
- No drawing devices were used, and a final wind-up speed of 6100 m/min. was maintained.
- Eight small hosiery beams, having 580 yarns each, were obtained.
- The final yarn count was 20 denier, and the residual elongation was 63%.
- By means of a Raschel knitting machine, onto which the above small beams of semi-dull polyester mono-filament yarns were loaded, together with small beams of 40 denier, 12 filament polyes- teryarn, a knitted fabric having the monofilament yarn as its substrate, was obtained.
- After subsequent dyeing with a dye sensitive enough to reveal possible irregularities, the substrate of monofilament yarn showed uniform dye absorption.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2323684 | 1984-10-19 | ||
IT23236/84A IT1175869B (en) | 1984-10-19 | 1984-10-19 | METHOD AND EQUIPMENT FOR THE PRODUCTION OF MONOFILAMENT THERMOPLASTIC SYNTHETIC THREADING CHAINS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0178644A1 EP0178644A1 (en) | 1986-04-23 |
EP0178644B1 true EP0178644B1 (en) | 1988-08-17 |
Family
ID=11205197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85113114A Expired EP0178644B1 (en) | 1984-10-19 | 1985-10-16 | Method and apparatus for the production of weaving warps of monofilament thermoplastic synthetic yarn |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0178644B1 (en) |
JP (1) | JPS61102447A (en) |
KR (1) | KR900005995B1 (en) |
DE (1) | DE3564457D1 (en) |
ES (1) | ES8609517A1 (en) |
IN (1) | IN163597B (en) |
IT (1) | IT1175869B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4116194B4 (en) * | 1991-05-17 | 2004-09-09 | Sucker-Müller-Hacoba GmbH & Co | Device for connecting warp tracks when changing the slip tree lot |
US6090485A (en) * | 1996-10-16 | 2000-07-18 | E. I. Du Pont De Nemours And Company | Continuous filament yarns |
KR102007314B1 (en) * | 2017-06-30 | 2019-08-05 | 주식회사 건호 | Method for manufacturing flat yarn formed by melt extrusion |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR881312A (en) * | 1941-07-03 | 1943-04-21 | Schlafhorst & Co W | Method and apparatus for winding webs of yarns |
US2964827A (en) * | 1956-06-04 | 1960-12-20 | Du Pont | Sping beaming |
DE3018373C2 (en) * | 1980-05-14 | 1983-11-17 | Karl Mayer Textil-Maschinen-Fabrik Gmbh, 6053 Obertshausen | Process for warping warp threads for weaving and knitting machines as well as warping plant for carrying out the process |
DE3233279A1 (en) * | 1982-09-08 | 1984-03-08 | W. Schlafhorst & Co, 4050 Mönchengladbach | Device for the recovery, storage and redelivery of a yarn group |
-
1984
- 1984-10-19 IT IT23236/84A patent/IT1175869B/en active
-
1985
- 1985-10-16 DE DE8585113114T patent/DE3564457D1/en not_active Expired
- 1985-10-16 EP EP85113114A patent/EP0178644B1/en not_active Expired
- 1985-10-18 ES ES547987A patent/ES8609517A1/en not_active Expired
- 1985-10-18 KR KR1019850007687A patent/KR900005995B1/en not_active IP Right Cessation
- 1985-10-18 JP JP60231424A patent/JPS61102447A/en active Granted
- 1985-10-22 IN IN753/CAL/85A patent/IN163597B/en unknown
Also Published As
Publication number | Publication date |
---|---|
JPH0143049B2 (en) | 1989-09-18 |
IT8423236A1 (en) | 1986-04-19 |
KR860003367A (en) | 1986-05-23 |
ES547987A0 (en) | 1986-09-01 |
KR900005995B1 (en) | 1990-08-20 |
JPS61102447A (en) | 1986-05-21 |
IN163597B (en) | 1988-10-15 |
EP0178644A1 (en) | 1986-04-23 |
DE3564457D1 (en) | 1988-09-22 |
IT1175869B (en) | 1987-07-15 |
ES8609517A1 (en) | 1986-09-01 |
IT8423236A0 (en) | 1984-10-19 |
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